Psychology 1000 Lecture Notes - Lecture 5: Neural Coding, Acetylcholine, Reuptake

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: L. Fazakas-Dehoog

Document Summary

Na2+ ions flow in (increase -70 resting potential) Shift in electrical charge travels along the neuron. If hits the threshold ap results, if doesn"t hit threshold graded potential happens. Neurotransmitters: chemical messengers that diffuse across synapses and activate receptor sites on adjacent cells. Cause depolarization (cell becomes less negative --> closer to threshold) Cause inflow of sodium or other (+ ions) yes votes --> moving closer to threshold for ap. After repolarization (+ions) flow out (- ions) flow in. no votes (moving cell farther away from firing ap) Psp"s can add together or cancel each other out. Temporal summation: overtime add up all the signals. Spatial summation: adding up various ends of dendrites. Epsps --> each time they happen they lower the threshold --> easier for next potential to reach threshold. After an impulse passes any point on the axon, the membrane isnt excitable and.